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- GNUPLOT 3.3 for OS/2 v 2.0
- ==========================
-
- 1) Introduction
- ===============
-
- This file discusses the version of GNUPLOT 3.3 implemented for OS/2 2.0.
-
- The command line interface of GNUPLOT is retained, while graphics output is
- plotted in a Presentation Manager Window. The GNUPLOT command line
- appears in another text-mode window on the screen.
-
- The PM window has facilities for printing the plot on the default printer,
- for changing the fonts used on the plot, and for switching between different
- ways of plotting the lines (with colour, as dot/dashed lines, or both).
-
- The command line window offers the usual GNUPLOT interface. Both Unix-style
- and DOS-style editing keys are supported.
-
- The GNUPLOT program was compiled with the emx version of the GNU compiler.
- It supports the shell command (type 'exit' to return to GNUPLOT), can pipe
- datafiles through external commands using '<', and supports command-line
- substitution. It runs the full set of demonstration programs supplied in
- the GNUPLOT source code distribution without problems.
-
- The GNUPLOT 3.3 port to OS/2 differs slightly from the 3.2 port, in that
- the PM driver is started from GNUPLOT, rather than the other way round.
- This means that the program name will have to be changed in the program
- object that runs GNUPLOT, if you install 3.3 over 3.2.
- This change does however make the GNUPLOT command line accessible to programs
- that pipe commands to GNUPLOT.
-
-
- 2) Running GNUPLOT
- ==================
-
- GNUPLOT can be run from the command line of an OS/2 session (preferrably
- a windowed command session, so that the command line and the displayed
- graph can be viewed at the same time), or can be set up as a program object
- in the WPS.
-
- GNUPLOT starts up as a command line session which accepts the usual
- GNUPLOT input. The Presentation Manager window for graphics display
- is only opened when the first 'plot' or 'splot' command is entered.
-
- If GNUPLOT is set up as a program object, it can be configured for
- 'drag and drop' in the usual way, by specifying '%*' as the program
- parameter.
-
- The PM window has facilities for printing the plot, for changing
- the fonts used in the plot, and so on. These of course are handled
- through the usual PM interface.
- In addition, you can 'drop' a font onto the window to change the font.
-
- The usual GNUPLOT commands can also be used to produce output on
- supported devices.
-
- Settings and the positions and sizes of the windows can be saved in
- the file gnushell.ini. This file is saved in the program's working
- directory; several different directories can be set up (as program
- objects) with different options, if you wish.
-
- GNUPLOT can be run with the PM display window maximised: clicking on
- the 'GNUPLOT' menu item (or pressing 'ESC') will bring the GNUPLOT
- window to the foreground; it will disappear again when plotting begins.
-
- GNUPLOT itself communicates with the PM display window (which is a
- separate program) through a named pipe. Plotting commands are sent to
- the PM window which produces the plot when all commands have been received.
-
- 3) The port of GNUPLOT to OS/2
- ==============================
-
- Changes to the code have been kept minimal. Besides the obvious addition
- of the PM driver code, the following are the major changes:
-
- 1) Addition of code in readline.c to map keypad keys to editing functions,
- to duplicate the MS-DOS mode of editing the command line. (See GNUPLOT manual,
- page 2.)
-
- The rest of the changes are associated with defining the use of the OS2
- conditional value, and setting system-dependent stuff like names, signal
- handling, and end-of-line handling (LF vs CR+LF).
-
- See the file patches.os2 for changes to the GNUPLOT source.
-
- 4) gnupmdrv.exe
- ===============
-
- Gnupmdrv.exe is the 'outboard' driver for GNUPLOT. It is a multithreaded
- PM program.
-
- Roger Fearick
- fearick@physci.uct.ac.za
- 5 November 1992
-